High-efficiency sand-water separator for sewage treatment

Abstract

This utility model discloses a high-efficiency sand-water separator for wastewater treatment, specifically relating to the field of wastewater treatment. It includes a housing with a spiral conveyor chamber installed on it; a cyclone separator is installed at the inlet end of the housing, and a buffer tank is installed at the outlet end of the cyclone separator, with a first deceleration assembly installed on the buffer tank; a guide tube is installed at the outlet end of the buffer tank, with a second deceleration assembly installed on the guide tube; a baffle assembly is installed inside the housing, inclined at the outlet of the guide tube; the buffer tank uses the first deceleration assembly to perform a primary deceleration on the wastewater discharged from the cyclone separator. This utility model pre-treats the floating fine sand particles in the sand-water mixture before decelerating the incoming water, avoiding the water swirling and agitation phenomenon caused by the large impact of the incoming water when treating wastewater containing a large amount of floating matter. This prevents lighter fine sand particles from overflowing back to the inlet pump room with the water flow, increasing the load and energy consumption of subsequent treatment.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and more specifically, to a high-efficiency sand-water separator for wastewater treatment. Background Technology

[0002] Urban sewage contains a large amount of silt and other suspended solids. If these substances are not removed through pretreatment, they will cause serious equipment wear and blockage in the subsequent sewage treatment system, reduce the MLVSS / MLSS ratio of activated sludge, and cause siltation in the biological treatment tank. This will affect the normal operation of the entire sewage treatment system, reduce treatment efficiency, and increase operating costs.

[0003] Existing technologies remove inorganic particles, especially sand, from wastewater by setting up sand removal facilities and using physical sedimentation and mechanical separation. Sand-water separators, as commonly used sand removal facilities, mainly consist of a water tank and a sand discharger. The sand-water mixture enters the water tank, and the heavier sand particles (particle size ≥ 0.2 mm) settle to the bottom of the water tank due to their own weight, while the lighter water remains on the upper layer and is subsequently discharged through the overflow port or drain pipe and sent back to the treatment process. The sand particles are pushed out of the water tank at an angle of about 30° by the shaftless spiral blades of the sand discharger.

[0004] When existing sand separators treat wastewater containing a large amount of floating matter, a large influx of water can cause swirling and turbulent water in the tank. At this time, the heavy sand particles will still settle. However, most of the floating matter consists of fine sand particles of 75-200μm. This causes the lighter fine sand particles to overflow back to the influent pump room with the water flow, affecting the efficiency of subsequent treatment and increasing the system load and energy consumption. Utility Model Content

[0005] The present invention provides a high-efficiency sand-water separator for sewage treatment, which aims to solve the following problem: When existing sand-water separators treat sewage containing a large amount of floating matter, a large influent impact can cause water swirling and turbulence in the water tank, resulting in lighter fine sand particles overflowing back to the influent pump room.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-efficiency sand-water separator for sewage treatment, comprising a housing with a spiral conveyor chamber installed on the housing; a cyclone separator installed at the inlet end of the housing, a buffer tank installed at the outlet end of the cyclone separator, and a first deceleration assembly installed on the buffer tank; a guide tube installed at the outlet end of the buffer tank, and a second deceleration assembly installed on the guide tube; a baffle assembly installed inside the housing, and the baffle assembly is inclined at the outlet of the guide tube; the buffer tank performs a first-stage deceleration on the sewage discharged from the cyclone separator through the first deceleration assembly, and the guide tube performs a second-stage deceleration on the sewage discharged from the buffer tank through the second deceleration assembly, and the sewage discharged from the guide tube impacts the bottom surface of the baffle assembly.

[0007] In a preferred embodiment, the first deceleration assembly includes a connecting hose, which is disposed between the buffer tank and the guide tube. The inner wall of the buffer tank is equipped with a buffer plate, and several groups of buffer plates are arranged vertically in a staggered manner. An arc-shaped groove is provided on the top of the buffer plate.

[0008] In a preferred embodiment, the outlet of the guide tube is located at one end, and the second deceleration component includes protrusions, with several sets of protrusions arranged along the bottom of the inner side of the guide tube.

[0009] In a preferred embodiment, the baffle assembly includes an inclined baffle, a weir plate mounted on the inclined baffle, a filler strip mounted at the angle between the inclined baffle and the weir plate, and a grid plate embedded inside the inclined baffle.

[0010] In a preferred embodiment, a water outlet pipe is installed on the tank, and a sedimentation tank is opened at the end of the tank away from the water outlet pipe, with the spiral conveyor chamber connected to the sedimentation tank.

[0011] In a preferred embodiment, the spiral conveyor includes a U-shaped seat, inside which shaftless spiral blades are installed. A sand outlet pipe is installed at the end of the U-shaped seat away from the sedimentation tank. A driver is installed on the U-shaped seat, and the output end of the driver is fixedly connected to the shaftless spiral blades.

[0012] In a preferred embodiment, a guide sleeve is installed at one end of the guide tube, and an elastic element is connected between the guide sleeve and the housing. A rotary connecting seat is fixedly installed at the top inside the housing, and a drive shaft is rotatably installed on the rotary connecting seat. A drive block is fixedly installed on the drive shaft, and a transmission gear is installed at one end of the drive shaft. A half gear is connected to one side of the transmission gear, and the half gear is located outside the buffer tank. An impeller is fixedly connected to the half gear through a central shaft, and the impeller is rotatably located inside the buffer tank.

[0013] In a preferred embodiment, the guide tube is provided with a self-adjusting component, which includes a mounting plate and an arc-shaped deceleration plate installed at the bottom of the mounting plate. The arc-shaped deceleration plate has a weir opening.

[0014] In a preferred embodiment, a guide post is fixedly provided on the top of the mounting plate. The guide post passes through the interior of the guide sleeve and the elastic element, and is positioned and connected to the inner top wall of the housing. A cleaning port is provided on the guide tube corresponding to the position of the arc-shaped speed reducer. The bottom end of the arc-shaped speed reducer passes through the interior of the cleaning port. A limiting piece is detachably connected to the bottom end of the arc-shaped speed reducer, and the limiting piece is located below the guide tube.

[0015] In a preferred embodiment, an air pump is provided on the outside of the housing, and a pipe assembly is installed at the output end of the air pump. The pipe assembly includes a U-shaped pipe, which is located inside the housing. Side air inlets are provided on both opposite sides of the U-shaped pipe, and straight air inlets are provided at both ends of the U-shaped pipe.

[0016] The beneficial effects of this utility model are as follows: This invention pretreats the floating fine sand particles in the sand-water mixture and then decelerates the water flow into the mixture. This avoids the water swirling and turbulence caused by the large impact of the incoming water when treating sewage containing a large amount of floating matter. This prevents the lighter fine sand particles from overflowing back to the inlet pump room with the water flow, thus increasing the load and energy consumption of subsequent treatment.

[0017] This invention utilizes staggered buffer plates in a buffer tank for vertical deceleration and energy dissipation, reducing the hydraulic impact during transport. The closer the buffer plates are to a horizontal arrangement, the better the deceleration and energy dissipation effect. The arc-shaped groove facilitates the sliding of sand particles off the buffer plates, preventing sand particles from accumulating and causing blockages. The sand-water mixture discharged from the buffer tank enters the guide tube, changing the vertical flow of the sand-water mixture to a horizontal flow. The raised blocks further decelerate and dissipate energy laterally, reducing the disturbance caused by the inlet water impact on the subsequent sand discharge.

[0018] This invention allows the sand-water mixture discharged from the guide tube to enter the interior of the tank laterally. The laterally discharged sand-water mixture then impacts the inclined baffle, causing the heavier sand particles to settle in the sedimentation tank at the bottom of the tank. The supernatant flows upward from the bottom of the inclined baffle at intervals, and some of the sand-water mixture overflows from the inclined baffle. Finally, all of it flows to the outlet pipe for discharge. The inclined baffle enhances the settling effect of large sand particles and improves the sand-water separation effect.

[0019] This invention, by setting a relatively stationary self-adjusting component, enables the guide tube to slow down the flow rate of the sand-water mixture when subjected to a large volume or high-speed impact of the mixture. This is achieved through multiple sets of arc-shaped deceleration plates. Furthermore, the "nodding" action increases the deceleration time of the sand-water mixture within the guide tube, while preventing the mixture from accumulating excessively inside the tube due to obstruction. This avoids damage caused by excessive water pressure within the guide tube. Attached Figure Description

[0020] Figure 1 This is a side view of the overall structure of this utility model.

[0021] Figure 2 This is a schematic diagram of the overall three-dimensional structure of this utility model.

[0022] Figure 3 This is a top view of the overall structure of this utility model.

[0023] Figure 4 This is a schematic diagram of the internal structure of the buffer tank of this utility model.

[0024] Figure 5 This is a schematic diagram of the internal structure of the guide tube of this utility model.

[0025] Figure 6 This is a schematic diagram of the guide tube of this utility model after it is tilted.

[0026] Figure 7 This is a schematic diagram of the rotating connecting seat structure of this utility model.

[0027] Figure 8 This is a three-dimensional structural diagram of the buffer plate of this utility model.

[0028] Figure 9 This is a three-dimensional structural diagram of the self-adjusting component of this utility model.

[0029] Figure 10 This is a top view of the pipe assembly structure of this utility model.

[0030] Figure 11 This is a three-dimensional structural diagram of the baffle assembly of this utility model.

[0031] Figure 12 This is a top view of the inclined baffle structure of this utility model.

[0032] The attached figures are labeled as follows: 1. Box body; 11. Sedimentation tank; 2. Spiral conveyor chamber; 21. U-shaped seat; 22. Shaftless spiral blade; 3. Hydrocyclone separator; 31. Buffer tank; 311. Connecting hose; 312. Buffer plate; 313. Arc-shaped groove; 32. Guide tube; 321. Protrusion; 322. Cleaning port; 33. Self-adjusting assembly; 331. Mounting plate; 332. Guide column; 333. Arc-shaped deceleration plate; 334. Limiting plate; 335. 34. Weir; 35. Guide sleeve; 36. Elastic element; 37. Rotary connecting seat; 38. Drive shaft; 39. Drive block; 30. Transmission gear; 31. Half gear; 32. Impeller; 33. Water outlet pipe; 44. Sand outlet pipe; 55. Driver; 66. Air pump; 77. Pipe assembly; 88. U-shaped pipe; 89. Side blow port; 80. Straight blow port; 91. Baffle assembly; 92. Inclined baffle; 93. Weir plate; 94. Filler strip; 95. Grid plate. Detailed Implementation

[0033] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0034] Refer to the instruction manual appendix Figures 1 to 5A high-efficiency sand-water separator for wastewater treatment includes a housing 1, on which a spiral conveyor 2 is installed; a cyclone separator 3 is installed at the inlet end of the housing 1, and a buffer tank 31 is installed at the outlet end of the cyclone separator 3, with a first deceleration assembly installed on the buffer tank 31; a guide tube 32 is installed at the outlet end of the buffer tank 31, with a second deceleration assembly installed on the guide tube 32; a baffle assembly 9 is installed inside the housing 1, and the baffle assembly 9 is inclined at the outlet of the guide tube 32; the buffer tank 31 performs a first-stage deceleration on the wastewater discharged from the cyclone separator 3 through the first deceleration assembly, and the guide tube 32 performs a second-stage deceleration on the wastewater discharged from the buffer tank 31 through the second deceleration assembly, with the wastewater discharged from the guide tube 32 impacting the bottom surface of the baffle assembly 9.

[0035] It should be noted that the hydrocyclone 3 is a hydrocyclone using existing mature technology. It has an overflow port at the top. After the sand-water mixture enters the hydrocyclone 3 through the tangential inlet on the side, under the action of the strong centrifugal force of high-speed rotation, the sand particles with a density much greater than that of water are "thrown" towards the inner wall of the separator and sink in a spiral motion along the wall. The separated mixture is discharged into the buffer tank 31 at the bottom of the hydrocyclone 3. The remaining ultrafine sand particles containing a small amount of light impurities or unseparated particles, especially fine sand of 75-200μm, gather towards the center of the hydrocyclone 3 under the action of centrifugal force due to their low density, forming an "rising vortex" that moves upward along the central axis of the hydrocyclone 3 and is discharged from the overflow port at the top of the hydrocyclone 3.

[0036] In this embodiment, the specific implementation scenario is as follows: the sand-water mixture first enters the hydrocyclone 3 for pretreatment, effectively removing smaller sand particles of 75-200μm. The sand-water mixture discharged from the hydrocyclone 3 enters the interior of the buffer tank 31, where it undergoes primary deceleration through the first deceleration component. The decelerated sand-water mixture then enters the guide tube 32, where it undergoes secondary deceleration through the second deceleration component, thereby reducing the hydraulic impact. The entire mixture passes through the pretreatment of floating fine sand particles in the sand-water mixture before being decelerated and fed into the water. This avoids the phenomenon of water swirling and turbulence caused by the large impact of the incoming water when treating wastewater containing a large amount of floating matter, which would cause lighter fine sand particles to overflow back to the inlet pump room with the water flow, increasing the load and energy consumption of subsequent treatment.

[0037] Furthermore, the first deceleration assembly includes a connecting hose 311, which is connected between the buffer tank 31 and the guide tube 32. The inner wall of the buffer tank 31 is equipped with a buffer plate 312, and several groups of buffer plates 312 are arranged vertically in a staggered manner. An arc-shaped groove 313 is provided on the top of the buffer plate 312.

[0038] It should be noted that the connecting hose 311 is a retractable hose, the buffer plate 312 is distributed along the spiral direction, and the end of the arc groove 313 away from the inner wall of the buffer tank 31 is the deep end.

[0039] Furthermore, the outlet of the guide tube 32 is located at one end, and the second deceleration assembly includes a protrusion 321, with several sets of protrusions 321 arranged along the bottom of the interior of the guide tube 32.

[0040] It should be noted that the protrusion 321 has an irregular shape, including but not limited to cylindrical, triangular, and rectangular shapes, which serves to dissipate energy and reduce the disturbance of the drainage from the guide tube 32 to the subsequent sand discharge.

[0041] Furthermore, the baffle assembly 9 includes an inclined baffle 91, a weir plate 92 is installed on the inclined baffle 91, a filler strip 93 is installed at the angle between the inclined baffle 91 and the weir plate 92, and a grid plate 94 is embedded inside the inclined baffle 91.

[0042] It should be noted that the inclined baffle 91 is installed at an angle, and the bottom surface of the inclined baffle 91 corresponds to the outlet of the guide tube 32. The weir plate 92 is a vertical plate component, the outer surface of the filling strip 93 is an arc-shaped surface, and the grid plate 94 is used to filter strip-shaped or ribbon-shaped impurities such as fibers and algae.

[0043] Furthermore, a water outlet pipe 4 is installed on the box body 1, and a sedimentation tank 11 is opened at the end of the box body 1 away from the water outlet pipe 4. The spiral conveying chamber 2 is connected to the sedimentation tank 11.

[0044] It should be noted that the side of the tank 1 is roughly triangular, the water outlet pipe 4 is located on the upper side of the tank 1, and the sedimentation tank 11 is located at the bottom of the guide tube 32.

[0045] Furthermore, the spiral conveyor hopper 2 includes a U-shaped seat 21, inside which a shaftless spiral blade 22 is installed. A sand outlet pipe 5 is installed at the end of the U-shaped seat 21 away from the sedimentation tank 11. A driver 6 is installed on the U-shaped seat 21, and the output end of the driver 6 is fixedly connected to the shaftless spiral blade 22.

[0046] It should be noted that the drive 6 and the shaftless spiral blade 22 are connected using existing technology to drive the shaftless spiral blade 22 to rotate inside the U-shaped seat 21, which can transport the sand particles inside the sedimentation tank 11 to the sand outlet pipe 5 for discharge.

[0047] The overall length is 7.2m, the height of container 1 is 2.55m, and the volume of container 1 is 7.4m³. 3 The shaftless spiral blade 22 is 6m long and installed at a 30° inclination angle, ensuring sand removal efficiency and sand moisture content. The hydrocyclone 3 has a height of 0.96m, an inlet height of 3.59m, an outlet pipe height of 4 of 2.32m, and a buffer tank 31 height of 0.36m. The drive unit 6 has a rated power of 1.5kW and a rated speed of 1410r / min. The sand removal rate is ≥92%, and the overall designed water treatment capacity is 85-145m³ / min.3 / h.

[0048] In this embodiment, the specific implementation scenario is as follows: When the sand-water mixture discharged from the cyclone separator 3 enters the buffer tank 31, it undergoes vertical deceleration and energy dissipation through the staggered buffer plates 312 in the buffer tank 31, reducing the hydraulic impact during transport. The closer the buffer plates 312 are to being horizontal, the better the deceleration and energy dissipation effect. The arc-shaped groove 313 facilitates the sliding of sand particles off the buffer plates 312, preventing sand particles from accumulating on the buffer plates 312 and causing blockage. The sand-water mixture discharged from the buffer tank 31 enters the guide tube 32, changing the vertical flow of the sand-water mixture to horizontal flow. The water flows laterally, and the protrusion 321 slows down and dissipates energy, reducing the disturbance caused by the impact of the incoming water on the subsequent sand discharge. The sand-water mixture discharged from the guide tube 32 enters the interior of the tank 1 laterally, and then the laterally discharged sand-water mixture hits the inclined baffle 91, causing the heavier sand particles to settle in the sedimentation tank 11 at the bottom of the tank 1. The supernatant flows upward from the bottom of the inclined baffle 91 at intervals, and some of the sand-water mixture overflows from the inclined baffle 91. Finally, all of them flow to the outlet pipe 4 for discharge. The inclined baffle 91 enhances the settling effect of large sand particles and improves the sand-water separation effect.

[0049] Refer to the instruction manual appendix Figures 5 to 12 When the water inlet speed and flow rate of the guide tube 32 suddenly increase, the water level inside the guide tube 32 rises rapidly. The deceleration effect of the fixed protrusion 321 is reduced. There is no deceleration measure at the high water level, which will still affect the disturbance of subsequent sand discharge. Since a large amount of sand particles are most likely to accumulate at the arc-shaped deceleration plate 333 closest to the buffer tank 31 (hereinafter referred to as the rightmost arc-shaped deceleration plate 333), sand particles are also likely to accumulate on the water inlet side of the protrusion 321, resulting in the guide tube 32 conveying poorly.

[0050] To solve this problem, the following technical solution is provided: A guide sleeve 34 is installed at one end of the guide tube 32, and an elastic element 35 is connected between the guide sleeve 34 and the housing 1. A rotary connecting seat 36 is fixedly installed at the top inside the housing 1. A drive shaft 361 is rotatably installed on the rotary connecting seat 36. A drive block 362 is fixedly installed on the drive shaft 361. A transmission gear 363 is installed at one end of the drive shaft 361. A half gear 364 is connected to one side of the transmission gear 363, and the half gear 364 is located outside the buffer tank 31. An impeller 365 is fixedly connected to the half gear 364 through a central shaft, and the impeller 365 is rotatably located inside the buffer tank 31.

[0051] It should be noted that the connecting hose 311 is located between the guide sleeve 34 and the rotating connecting seat 36, and the connecting hose 311 is close to the rotating connecting seat 36. One end of the guide tube 32 is rotatably connected to the housing 1 through the rotating connecting seat 36 and the drive block 362. The other end of the guide tube 32 is elastically connected to the housing 1 through the elastic element 35. The elastic element 35 is an elastic component with a high elastic coefficient, similar to a vehicle shock absorber spring assembly, which can withstand the impact deformation and recovery of a large amount of high-velocity sand-water mixture. Figure 5 and Figure 6 For the sake of simplification, the bottom buffer plate 312 is located above the blades on one side of the impeller 365. That is, the sand-water mixture guided by the bottom buffer plate 312 impacts the blades on one side of the impeller 365, causing the impeller 365 to rotate clockwise. This causes the guide tube 32 to rotate counterclockwise around the drive shaft 361 via the transmission gear 363.

[0052] Furthermore, the interior of the guide tube 32 is provided with a self-adjusting component 33, which includes a mounting plate 331. An arc-shaped deceleration plate 333 is installed at the bottom of the mounting plate 331, and a weir 335 is opened on the arc-shaped deceleration plate 333.

[0053] It should be noted that the height of the arc-shaped speed reducer 333 is half the height of the guide tube 32. Multiple sets of arc-shaped speed reducers 333 are arranged horizontally, and the weir positions 335 of the multiple sets of arc-shaped speed reducers 333 are staggered.

[0054] Furthermore, a guide post 332 is fixedly provided on the top of the mounting plate 331. The guide post 332 passes through the interior of the guide sleeve 34 and the elastic element 35, and the guide post 332 is positioned and connected to the top wall of the housing 1. A cleaning port 322 is provided on the flow guide tube 32 at the position corresponding to the arc-shaped deceleration plate 333. The bottom end of the arc-shaped deceleration plate 333 passes through the interior of the cleaning port 322. The bottom end of the arc-shaped deceleration plate 333 is detachably connected to a limiting piece 334, and the limiting piece 334 is located below the flow guide tube 32.

[0055] It should be noted that the guide post 332 is arc-shaped. When the guide tube 32 is tilted downward, the guide sleeve 34 slides along the direction of the guide post 332. The arc-shaped deceleration plate 333 has a margin outside the guide tube 32. The leakage at the cleaning port 322 is small and will not affect the overall operation.

[0056] Furthermore, an air pump 7 is provided on the outside of the housing 1, and a pipe assembly 8 is installed at the output end of the air pump 7. The pipe assembly 8 includes a U-shaped pipe 81, and the U-shaped pipe 81 is located inside the housing 1. Side blowing ports 82 are provided on both sides of the U-shaped pipe 81, and straight blowing ports 83 are provided at both ends of the U-shaped pipe 81.

[0057] It should be noted that the side blowout 82 blows air towards the inclined baffle 91, while the direct blowout 83 blows air into the guide tube 32.

[0058] In this embodiment, the specific implementation scenario is as follows: when the water flow rate and water volume inside the buffer tank 31 increase simultaneously or one of them increases, the impeller 365 will rotate faster. The toothed portion of the half-gear 364 will drive the transmission gear 363 to rotate, causing the drive shaft 361 to drive the drive block 362 to rotate. This, in turn, will cause the guide tube 32 to gradually rotate and tilt. The tilt angle of the guide tube 32 is freely limited by the limiting plate 334. At this time, the mounting plate 331, guide post 332, and arc-shaped speed reducer 333 remain stationary relative to the guide tube 32. Therefore, the position of the arc-shaped speed reducer 333 inside the guide tube 32 rises, meaning the original position of the arc-shaped speed reducer 333 is now horizontal. In the lower half of the guide tube 32, after the guide tube 32 is tilted, the arc-shaped deceleration plate 333 covers more than 1 / 2 or fully covers the guide tube 32 to adapt to the rise in water level inside the guide tube 32. Multiple sets of arc-shaped deceleration plates 333, with staggered weir openings 335, decelerate and dissipate the increasing speed and volume of the sand-water mixture inside the guide tube 32. When the toothless part of the half-gear 364 corresponds to the transmission gear 363, the elastic element 35 drives the guide tube 32 to return to a horizontal state. At this time, the opening area of ​​the guide tube 32 increases, facilitating the discharge of a large amount of decelerated and dissipated sand-water mixture, preventing the accumulation of a large amount of decelerated and dissipated sand-water mixture inside the guide tube 32. The guide tube 32 repeats the above "nodding" action to remove sand accumulated on the inlet side of the protrusion 321. The particles are agitated and discharged with the decelerated and energy-dissipated sand-water mixture, ensuring smooth conveying in the guide tube 32. By setting a relatively stationary self-adjusting component 33, the guide tube 32 can slow down the flow rate of the sand-water mixture when subjected to a large volume or high-speed impact from the mixture via multiple sets of arc-shaped deceleration plates 333. Furthermore, the aforementioned "nodding" action increases the deceleration time of the sand-water mixture within the guide tube 32 while preventing excessive accumulation of the mixture inside, thus avoiding damage due to excessive water pressure. By installing an air pump 7 and a pipe assembly 8, backflushing cleaning of the guide tube 32 and baffle assembly 9 can be performed during operation or shutdown. The air pump 7 blows air into the interior of the U-shaped pipe 81, through side blowing... Air is blown from the side through port 82 onto the baffle assembly 9 to clean impurities adhering to it. This allows for cleaning of the baffle assembly 9 during operation. Air is also blown into the guide tube 32 through the direct blow port 83, allowing for backflushing cleaning of the self-adjusting component 33 and the protrusion 321 when the machine is stopped. During cleaning, the limiting plate 334 is removed, and a large amount of high-speed clean water is injected into the guide tube 32 through the cyclone separator 3, causing the guide tube 32 to tilt to its maximum angle. At the maximum tilt angle, all the arc-shaped deceleration plates 333 are located inside the guide tube 32, with their bottom ends detached from the cleaning port 322, opening the cleaning port 322 for easy discharge of sand particles. Since the guide tube 32 is tilted with one end as a fixed point, the rightmost arc-shaped deceleration plate 333 is furthest from the corresponding cleaning port 322 and has the largest space.To facilitate the discharge of a large amount of accumulated sand on one side, multiple sets of arc-shaped deceleration plates 333 are arranged in approximately parallel and equidistant positions. Therefore, when the guide cylinder 32 rotates counterclockwise to its maximum angle around the drive shaft 361, the limiting plate 334 has been removed. Thus, from left to right, the distance between the bottom of the arc-shaped deceleration plate 333 and the inner bottom wall of the guide cylinder 32 gradually increases. Furthermore, because the rightmost arc-shaped deceleration plate 333 is the first to be impacted by the sand-water mixture, most of the sand particles will deposit at the angle between the rightmost arc-shaped deceleration plate 333 and the guide cylinder 32. Therefore, the larger distance between the rightmost arc-shaped deceleration plate 333 and the guide cylinder 32 makes subsequent cleaning of the sand particles easier.

[0059] Working principle: 1. After the sand-water mixture enters the cyclone separator 3 from the side, it undergoes cyclone separation to separate and remove smaller sand particles of 75-200μm.

[0060] Second, the sand-water mixture enters the buffer tank 31 again, where it undergoes initial deceleration and energy dissipation through the buffer plate 312 to reduce the impact force of the water flow.

[0061] Third, the sand-water mixture then enters the interior of the guide tube 32, where it undergoes secondary deceleration and energy dissipation through the protrusion block 321 and the arc-shaped deceleration plate 333. This can adapt to situations where the water inflow suddenly increases and reduce the disturbance caused by the water inflow impact.

[0062] Fourth, the sand-water mixture eventually enters the tank 1, contacts and flows along the inclined baffle 91, causing large sand particles to be deposited into the sedimentation tank 11 below.

[0063] 5. The shaftless spiral blades 22 are driven by the driver 6 to move the sand particles deposited in the sedimentation tank 11 upward. At the same time as they move upward, the water in the sand particles is drained down, so that the sand particles gradually dry out. Finally, the sand particles are discharged from the sand outlet pipe 5.

[0064] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. A high-efficiency sand-water separator for wastewater treatment, characterized in that: Includes a housing (1), on which a spiral conveyor chamber (2) is installed; A cyclone separator (3) is installed at the water inlet end of the tank (1), and a buffer tank (31) is installed at the outlet end of the cyclone separator (3). A first deceleration assembly is installed on the buffer tank (31). The outlet end of the buffer tank (31) is equipped with a guide tube (32), and a second deceleration assembly is installed on the guide tube (32); The box (1) is equipped with a baffle assembly (9) inside, and the baffle assembly (9) is inclined at the outlet of the guide tube (32); The buffer tank (31) decelerates the sewage discharged from the cyclone separator (3) in a first-stage deceleration process through the first deceleration assembly, and the guide tube (32) decelerates the sewage discharged from the buffer tank (31) in a second-stage deceleration process through the second deceleration assembly. The sewage discharged from the guide tube (32) impacts the bottom surface of the baffle assembly (9).

2. The high-efficiency sand-water separator for wastewater treatment according to claim 1, characterized in that: The first deceleration assembly includes a connecting hose (311), and the connecting hose (311) is connected between the buffer tank (31) and the guide tube (32). The inner wall of the buffer tank (31) is equipped with a buffer plate (312), and several groups of buffer plates (312) are arranged vertically and alternately. The top of the buffer plate (312) is provided with an arc groove (313).

3. The high-efficiency sand-water separator for wastewater treatment according to claim 2, characterized in that: The outlet of the guide tube (32) is located at one end. The second deceleration component includes a protrusion (321), and several sets of the protrusion (321) are arranged along the bottom of the inside of the guide tube (32).

4. The high-efficiency sand-water separator for wastewater treatment according to claim 3, characterized in that: The baffle assembly (9) includes an inclined baffle (91), a weir plate (92) is installed on the inclined baffle (91), a filler strip (93) is installed at the angle between the inclined baffle (91) and the weir plate (92), and a grid plate (94) is embedded inside the inclined baffle (91).

5. A high-efficiency sand-water separator for wastewater treatment according to claim 4, characterized in that: The box (1) is equipped with a water outlet pipe (4), and a sedimentation tank (11) is opened at the end of the box (1) away from the water outlet pipe (4). The spiral conveying chamber (2) is connected to the sedimentation tank (11).

6. A high-efficiency sand-water separator for wastewater treatment according to claim 5, characterized in that: The spiral conveying chamber (2) includes a U-shaped seat (21), inside which a shaftless spiral blade (22) is installed. A sand outlet pipe (5) is installed at one end of the U-shaped seat (21) away from the sedimentation tank (11). A driver (6) is installed on the U-shaped seat (21), and the output end of the driver (6) is fixedly connected to the shaftless spiral blade (22).

7. A high-efficiency sand-water separator for wastewater treatment according to claim 6, characterized in that: One end of the guide tube (32) is equipped with a guide sleeve (34), and an elastic element (35) is connected between the guide sleeve (34) and the housing (1). A rotating connecting seat (36) is fixedly installed at the top of the inside of the housing (1). A drive shaft (361) is rotatably installed on the rotating connecting seat (36). A drive block (362) is fixedly installed on the drive shaft (361). A transmission gear (363) is installed at one end of the drive shaft (361). A half gear (364) is connected to one side of the transmission gear (363), and the half gear (364) is located outside the buffer tank (31). An impeller (365) is fixedly connected to the half gear (364) through a central shaft, and the impeller (365) is rotatably located inside the buffer tank (31).

8. A high-efficiency sand-water separator for wastewater treatment according to claim 7, characterized in that: The guide tube (32) is provided with a self-adjusting component (33) inside. The self-adjusting component (33) includes a mounting plate (331). An arc-shaped deceleration plate (333) is installed at the bottom of the mounting plate (331). A weir (335) is opened on the arc-shaped deceleration plate (333).

9. A high-efficiency sand-water separator for wastewater treatment according to claim 8, characterized in that: The top of the mounting plate (331) is fixedly provided with a guide post (332), which passes through the inside of the guide sleeve (34) and the elastic element (35). The guide post (332) is positioned and connected to the top wall of the housing (1). The flow guide (32) is provided with a cleaning port (322) at the position corresponding to the arc-shaped deceleration plate (333). The bottom end of the arc-shaped deceleration plate (333) passes through the inside of the cleaning port (322). The bottom end of the arc-shaped deceleration plate (333) is detachably connected to a limiting piece (334), and the limiting piece (334) is located below the flow guide (32).

10. A high-efficiency sand-water separator for wastewater treatment according to claim 9, characterized in that: An air pump (7) is provided on the outside of the box (1). A pipe assembly (8) is installed at the output end of the air pump (7). The pipe assembly (8) includes a U-shaped pipe (81) and the U-shaped pipe (81) is located inside the box (1). Side blowing ports (82) are provided on both sides of the U-shaped pipe (81), and straight blowing ports (83) are provided at both ends of the U-shaped pipe (81).

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